The 2016 election came down to the plight of Rust Belt voters in Pennsylvania, Ohio and Michigan.
Hillary Clinton ignored her husband’s advice and thus neglected the Rust Belt when campaigning. The Rust Belt ultimately rejected her. These rural voters — who heavily supported Barack Obama on the prospect of hope and change — voted for Trump in what they may believe to be their own economic self-interest.
The title hints that a trip on the train from Central Station in Washington DC (a punt kick from Hillary’s office) to Detroit would have told the Clinton team where they needed to make their pitch. But politicians don’t campaign on the train any more.